Improvement in electrical stops for looms



G. F. LUFBERY.

Electrical Stops for Looms, M1.

N0. 142,925. Patented September 16,1873.

NI'IED STATES PATENT OFFICE.

IMPROVEMENT lN ELECTRlCAL STOPS FOR LOOMS, 80c.

- Specifioatioii forming part of Letters Patent No. 142,995, datedSeptember 16, 1873; application filed May 1, 1873.

To all whom itmay concern.-

Be it known that I, GEORGE FREEMAN LUFBEBY, of Montargis Department ofLoiret, France, have invented a system or device for throwing out ofgear stockinet or other machines, of which the following is aspeciiication:

My invention consists of a stop-motion for looms, orknitting or othermachines, in which an electric current is made the means of stopping themachine when a knot occurs in a thread, the latter is broken, a needlebecomes bent, or other part is disarranged.

The invention isrepresented in the drawing as applied to an ordinary,stockinet-machine, the construction which is too well known to needeither description or illustration of any parts other than those'with"which the improved stop-motion is directly connected. v Each thread ofthe machine, after it leaves.

the bobbin, or warp-beam, passes between the diverging arms of a splitbar, 2, thence over a friction-pad, l, of rubber or its equivalent, andover a guide, a. A bent wire or yokefi is hung uponthe thread betweenthe points i) c, the ends of the wire extending into cells 9 g", each ofwhich is partly-filled with mercury, and is connected'by a wire to oneof the poles of a battery. Should the thread break or the bobbin becomeempty, the wire f, no longer supported, will fall and establish acommunication between the two cells'and complete the electric circuit,causing the application of a break, and throwin the driving-shaft out ofgear, as descri hereafter. Should there be a knot in the thread it willprevent the passage of the same through the split standard 2, so that itwill-break and cause the completion of the circuit, as just described.To the guide bara is secured a tame, on which are supported twosmall'rcckshafts,' u u, having projections c 1:, between which there isspace just suflic'ient to permit (Land, E E arms of a toggle-jointconnected at one end to the frame 0 and at the other to a strip,P,jointed to any stationary part of the machine. A rod, F, is connected tothe center of the toggle-joint and to a trip-lever, G, from the otherend of which is suspended a "blade, Q. .A catch, L, arranged tosupportthe outer end of the lever G in an elevated position is also the keeperof an electromagnet, K, to which the wires leading from the cells 9 gand plates. 6 l are connected. A spring, M,- tends to draw together thestrip 1 and frame 0, and isretracted when the joint is in ahorizcntal'posit-iom-the lever G and plate Q are elevated, and thepulley B, operated from the driving-shaft. is iu'i'rictional contactwith the pulley A.

When, however, on the breaking of a thread, bending'of a needle,ordisarranging of any important'pa'rt-of the machine, the magnet Kbecomes active, the keeper is drawn back, and the lever G falls untilthe plate Q is grasped between'the pulleys B B, by which it will bedrawn farther downward until the toggle-joint is raised sufliciently topermit the spring M to draw back the frame 0, a spri l v N, draw ingforward the strip P, and maintaining the pulleys B A in contact-untilthe blade Q is well depressed. When the frame 0 is drawn back theperiphery of the pulley B- is brought in frictional contact with therecessed shoe H, by which the further'rotatioh is arrested.

When the pulleys A B are in frictional contact, a plate, W, on the frame0 is in contact with a plate, X, and maintains the circuit, the latterbeing broken when the motion of the machine is arrested, so asto'prevent wasteof material inthc battery.

It willalso be apparent that the stoppirg mechanism described andillustrated in Fig,

5 may be applied to various machines and apparatus.

I claim- 1. The combination, in a. knitting-machine or loom, of a seriesof wire yokes, f, each hung upon a thread above the separatedmercurycups 9 g, forming part of a' circuit, which is completed upon thedescent of the yoke, as set forth.

2. The combination of the split bars z, cells 9 g, and yokes j,supported by threads above the cells, as specified.

3.-The combination, with the needles or other part ofthe machine of alever or levers so arranged as to be strucir by such part when out ofposition, and to complete or break an electric current, as specified.

4. The combination, with the pulleyA, of the drivingpulley B, the leverG, supported by the keeper L. of a magnet, and devices de' scribed, ortheir equivalents, by which the pul' -leys are separated on themovementof the keeper.

In testimony whereof I have signed my name to this specification in thepresence of two subscribjn g witnesses.

' GEO. F. LUFBERY.

Witnesses A. DELINE,

EMILE RICHARD.

